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GUIDANCE DOCUMENT

M13B Bioequivalence for Immediate-Release Solid Oral Dosage Forms: Additional Strengths Biowaiver Draft Guidance for Industry May 2025

Download the Draft Guidance Document Read the Federal Register Notice
Draft

Not for implementation. Contains non-binding recommendations.

This guidance is being distributed for comment purposes only.

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Although you can comment on any guidance at any time (see 21 CFR 10.115(g)(5)), to ensure that the FDA considers your comment on a draft guidance before it begins work on the final version of the guidance, submit either online or written comments on the draft guidance before the close date.

If unable to submit comments online, please mail written comments to:

Dockets Management
Food and Drug Administration
5630 Fishers Lane, Rm 1061
Rockville, MD 20852

All written comments should be identified with this document's docket number: FDA-2023-D-0093

Docket Number:
FDA-2023-D-0093
Issued by:
Guidance Issuing Office
Center for Drug Evaluation and Research

The Food and Drug Administration (FDA or Agency) is announcing the availability of a draft guidance for industry entitled “M13B Bioequivalence for Immediate-Release Solid Oral Dosage Forms: Additional Strengths Biowaiver.” The draft guidance was prepared under the auspices of the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH). The draft guidance is the second in the ICH M13 series of guidances and describes the scientific and technical aspects of study design and data analysis to support bioequivalence (BE) assessment for additional strengths of orally administered immediate-release (IR) solid oral dosage forms (i.e., tablets, capsules, and granules/powders for oral suspension), including considerations for biowaivers. The intent of this draft guidance is to provide harmonized criteria and data that support waivers for drug applications with multiple strengths when in vivo BE has been demonstrated for at least one strength using the principles outlined in the final guidance “M13A Bioequivalence for Immediate-Release Solid Oral Dosage Forms” published in October 2024.

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